Specific exposure group frequencies and asthma risk estimates (univariate)
| Cases/controls (n) | OR (95% CI)4-150 | |
| n (total) | 172 / 285 | |
| High MW agents, combined | 15 / 20 | 1.4 (0.6 to 2.9) |
| Animal danders | 2 / 3 | |
| Fish or shellfish | 0 / 0 | |
| Arthropods, mites | 0 / 1 | |
| Latex | 9 / 11 | 1.5 (0.5 to 4.1) |
| Flour | 1 / 3 | |
| Other plant antigens | 0 / 0 | |
| Bioaerosols | 5 / 4 | 2.3 (0.5 to 11.8) |
| Enzymes | 1 / 3 | |
| Low MW agents, combined | 26 / 21 | 2.3 (1.2 to 4.4) |
| Highly reactive chemicals | 17 / 12 | 2.6 (1.1 to 6.2) |
| Isocyanates | 1 / 2 | |
| Drugs | 4 / 3 | |
| Industrial cleaning agents | 8 / 2 | 7.4 (1.4 to 71.7) |
| Wood dusts | 1 / 2 | |
| Metal sensitisers, fumes | 7 / 5 | 2.6 (0.7 to 10.5) |
| Mixed environments, combined | 14 / 12 | 2.1 (0.9 to 5.2) |
| Metal working fluid environments | 4 / 3 | |
| Agriculture | 2 / 2 | |
| Textile production | 5 / 5 | 1.8 (0.4 to 8.1) |
| Irritant peaks | 3 / 2 |
↵4-150 ORs were calculated only for groups with five or more exposed cases and exact 95% CIs are shown. The reference category included other subjects not in any of the high risk categories (n=379).